Fair Value Measurement (Schedule of Financial Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Carrying Value
Financial assets:
Other assets	$ 21,747	$ 23,257
Financial liabilities:
Other liabilities	20,915	22,469
Carrying Value \| Revolving Credit Facility
Financial liabilities:
Revolving Credit Agreement and Term Loan	125,000	125,000
Carrying Value \| Term Loan
Financial liabilities:
Revolving Credit Agreement and Term Loan	112,500	114,063
Carrying Value \| Contribution Certificates
Financial liabilities:
Contribution Certificates	182,838	182,500
Carrying Value \| BOLI
Financial assets:
Short-term and other investments	83,241	82,787
Carrying Value \| Other investments
Financial assets:
Short-term and other investments	7,207	7,185
Fair Value
Financial assets:
Other assets	21,747	23,257
Financial liabilities:
Other liabilities	20,915	22,469
Fair Value \| Revolving Credit Facility
Financial liabilities:
Revolving Credit Agreement and Term Loan	125,000	125,000
Fair Value \| Term Loan
Financial liabilities:
Revolving Credit Agreement and Term Loan	112,500	114,063
Fair Value \| Contribution Certificates
Financial liabilities:
Contribution Certificates	157,895	165,449
Fair Value \| BOLI
Financial assets:
Short-term and other investments	83,241	82,787
Fair Value \| Other investments
Financial assets:
Short-term and other investments	$ 7,207	$ 7,185